题目

To us, it seems so natural to put up an umbrella to keep the water off when it rains. But in fact the umbrella was not invented as protection against the rain. Its first use was as a shade(遮蔽)against the sun.     Nobody knows who first invented it, but the umbrella was used in very ancient times. Probably the first to use it were the Chinese, back in the eleventh century BC.     We know that the umbrella was used in ancient Egypt and Babylon as a sunshade. And there was a strange thing connected with its use : it became a symbol of honor and power(权力). In the Far East in过点（1，0）且与直线x-2y-2=0垂直的直线方程是(     ) （A）x-2y-1=0        (B)2x-y-2=0      (C) x+2y-1=0       （D）2x+y-2=0